private async Task <CommentSelectionResult> ToggleBlockCommentsAsync(Document document, CommentSelectionInfo commentInfo,
ITextStructureNavigator navigator, NormalizedSnapshotSpanCollection selectedSpans, CancellationToken cancellationToken)
{
var firstLineAroundSelection = selectedSpans.First().Start.GetContainingLine().Start;
var lastLineAroundSelection = selectedSpans.Last().End.GetContainingLine().End;
var linesContainingSelection = TextSpan.FromBounds(firstLineAroundSelection, lastLineAroundSelection);
var blockCommentedSpans = await GetBlockCommentsInDocumentAsync(
document, selectedSpans.First().Snapshot, linesContainingSelection, commentInfo, cancellationToken).ConfigureAwait(false);
var blockCommentSelections = selectedSpans.SelectAsArray(span => new BlockCommentSelectionHelper(blockCommentedSpans, span));
var returnOperation = Operation.Uncomment;
var textChanges = ArrayBuilder <TextChange> .GetInstance();
var trackingSpans = ArrayBuilder <CommentTrackingSpan> .GetInstance();
// Try to uncomment until an already uncommented span is found.
foreach (var blockCommentSelection in blockCommentSelections)
{
// If any selection does not have comments to remove, then the operation should be comment.
if (!TryUncommentBlockComment(blockCommentedSpans, blockCommentSelection, textChanges, trackingSpans, commentInfo))
{
returnOperation = Operation.Comment;
break;
}
}
if (returnOperation == Operation.Comment)
{
textChanges.Clear();
trackingSpans.Clear();
foreach (var blockCommentSelection in blockCommentSelections)
{
BlockCommentSpan(blockCommentSelection, navigator, textChanges, trackingSpans, commentInfo);
}
}
return(new CommentSelectionResult(textChanges.ToArrayAndFree(), trackingSpans.ToArrayAndFree(), returnOperation));
}